Type 'Observable<User> | Observable<null>' is not assignable to type 'ObservableInput<User | null>'.

[esaysimyan]

On updating the project, I've run into this problem now. New to Angular .. so please help.

ERROR in src/app/core/auth.service.ts(32,9): error TS2345: Argument of type '(user: User | null) => Observable | Observable' is not assignable to parameter of type '(value: User | null, index: number) => ObservableInput<User | null>'. Type 'Observable | Observable' is not assignable to type 'ObservableInput<User | null>'. Type 'Observable' is not assignable to type 'ObservableInput<User | null>'. Type 'Observable' is not assignable to type 'ArrayLike<User | null>'. Property 'length' is missing in type 'Observable'.

src/app/uploads/shared/upload.service.ts(41,7): error TS2345: Argument of type '(snapshot: UploadTaskSnapshot) => void' is not assignable to parameter of type 'Observer<any, any> | ((a: Object) => any) | null | undefined'. Type '(snapshot: UploadTaskSnapshot) => void' is not assignable to type '(a: Object) => any'. Types of parameters 'snapshot' and 'a' are incompatible. Type 'Object' is not assignable to type 'UploadTaskSnapshot'. The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead? Property 'bytesTransferred' is missing in type 'Object'. src/app/uploads/shared/upload.service.ts(46,8): error TS7006: Parameter 'error' implicitly has an 'any' type.

[javierfelix]

i have the same error

[javierfelix]

did you fix it?

[atheekalm]

are you using --strictNullChecks ?